diff --git a/.abf.yml b/.abf.yml
index f100a67..212c97d 100644
--- a/.abf.yml
+++ b/.abf.yml
@@ -1,3 +1,4 @@
 sources:
   widelands-build18-src.tar.bz2: 369d765671bcbf1d7156c1ed0f914ceec0e814bb
   widelands-build20.tar.bz2: a2fdedf81c08fd08809b8556c955a6a7f32c1eed
+  widelands-build21-source.tar.gz: 6e759c187db71afb6c4ea5e0d4d896a032f09696
diff --git a/widelamds_bld21-rosa.patch b/widelamds_bld21-rosa.patch
new file mode 100644
index 0000000..2bccf45
--- /dev/null
+++ b/widelamds_bld21-rosa.patch
@@ -0,0 +1,342 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 018d9ea..5fedee1 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -300,7 +300,6 @@ endif()
+ wl_add_flag(WL_COMPILE_DIAGNOSTICS "-Werror=format-security")
+ wl_add_flag(WL_COMPILE_DIAGNOSTICS "-Werror=return-type")
+ wl_add_flag(WL_COMPILE_DIAGNOSTICS "-Werror=shadow")
+-wl_add_flag(WL_COMPILE_DIAGNOSTICS "-Werror=uninitialized")
+ 
+ IF (WIN32)
+   add_definitions(-DMINGW_HAS_SECURE_API -DWIN32_LEAN_AND_MEAN -D__STDC_FORMAT_MACROS -D__USE_MINGW_ANSI_STDIO)
+diff --git a/cmake/WlFunctions.cmake b/cmake/WlFunctions.cmake
+index 21a59bc..89244d7 100644
+--- a/cmake/WlFunctions.cmake
++++ b/cmake/WlFunctions.cmake
+@@ -289,5 +289,5 @@ function(wl_binary NAME)
+ 
+   #Quoting the CMake documentation on DESTINATION:
+   #"If a relative path is given it is interpreted relative to the value of CMAKE_INSTALL_PREFIX"
+-  install(TARGETS ${NAME} DESTINATION "." COMPONENT ExecutableFiles)
++  install(TARGETS ${NAME} DESTINATION games COMPONENT ExecutableFiles)
+ endfunction()
+diff --git a/cmake/codecheck/CodeCheck.py b/cmake/codecheck/CodeCheck.py
+index 672ae80..3711184 100755
+--- a/cmake/codecheck/CodeCheck.py
++++ b/cmake/codecheck/CodeCheck.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python3
++#!/usr/bin/python3
+ # -*- coding: utf-8 -*-
+ #
+ 
+diff --git a/cmake/codecheck/rules/assert0.py b/cmake/codecheck/rules/assert0.py
+index 5afabcc..f1a1c1a 100644
+--- a/cmake/codecheck/rules/assert0.py
++++ b/cmake/codecheck/rules/assert0.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python -tt
++#!/usr/bin/python3 -tt
+ # encoding: utf-8
+ #
+ 
+diff --git a/cmake/codecheck/rules/garbage_after_include.py b/cmake/codecheck/rules/garbage_after_include.py
+index cab17bc..7f2b56b 100644
+--- a/cmake/codecheck/rules/garbage_after_include.py
++++ b/cmake/codecheck/rules/garbage_after_include.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python -tt
++#!/usr/bin/python3 -tt
+ # encoding: utf-8
+ #
+ 
+diff --git a/cmake/codecheck/rules/increment_decrement.py b/cmake/codecheck/rules/increment_decrement.py
+index ae4f222..a0fe4d0 100644
+--- a/cmake/codecheck/rules/increment_decrement.py
++++ b/cmake/codecheck/rules/increment_decrement.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python -tt
++#!/usr/bin/python3 -tt
+ # encoding: utf-8
+ #
+ 
+diff --git a/cmake/codecheck/run_tests.py b/cmake/codecheck/run_tests.py
+index 6c47456..217da2a 100755
+--- a/cmake/codecheck/run_tests.py
++++ b/cmake/codecheck/run_tests.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ #
+ 
+diff --git a/doc/sphinx/extract_rst.py b/doc/sphinx/extract_rst.py
+index ee3094d..2250f49 100755
+--- a/doc/sphinx/extract_rst.py
++++ b/doc/sphinx/extract_rst.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ from glob import glob
+diff --git a/regression_test.py b/regression_test.py
+index d7ae42b..9d6099e 100755
+--- a/regression_test.py
++++ b/regression_test.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ from glob import glob
+diff --git a/utils/build_deps.py b/utils/build_deps.py
+index acf9aa2..c375600 100755
+--- a/utils/build_deps.py
++++ b/utils/build_deps.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ """Simple script to check that the build dependencies in the CMakeLists.txt
+diff --git a/utils/buildcat.py b/utils/buildcat.py
+index 2568a5f..c08004b 100755
+--- a/utils/buildcat.py
++++ b/utils/buildcat.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ ##############################################################################
+diff --git a/utils/crop_animation.py b/utils/crop_animation.py
+index 2265b8e..eee20a0 100755
+--- a/utils/crop_animation.py
++++ b/utils/crop_animation.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # -*- coding: utf-8 -*-
+ 
+ # Copyright (C) 2010 by the Widelands Development Team
+diff --git a/utils/detect_revision.py b/utils/detect_revision.py
+index 0357897..958f9dd 100755
+--- a/utils/detect_revision.py
++++ b/utils/detect_revision.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # -*- coding: utf-8 -*-
+ 
+ # Tries to find out the repository revision of the current working directory
+diff --git a/utils/file_utils.py b/utils/file_utils.py
+index b2047a1..183f715 100755
+--- a/utils/file_utils.py
++++ b/utils/file_utils.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # -*- coding: utf-8 -*-
+ 
+ 
+diff --git a/utils/find_unused_includes.py b/utils/find_unused_includes.py
+index 75e7baf..f71d182 100755
+--- a/utils/find_unused_includes.py
++++ b/utils/find_unused_includes.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python3
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ """Script to find unused includes.
+diff --git a/utils/fix_formatting.py b/utils/fix_formatting.py
+index 02f6059..c9b1483 100755
+--- a/utils/fix_formatting.py
++++ b/utils/fix_formatting.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # -*- coding: utf-8 -*-
+ 
+ 
+diff --git a/utils/generate_glossary.py b/utils/generate_glossary.py
+index 753b7fc..ee40580 100755
+--- a/utils/generate_glossary.py
++++ b/utils/generate_glossary.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ 
+diff --git a/utils/glossary_checks.py b/utils/glossary_checks.py
+index ddbf2cb..b2228e0 100755
+--- a/utils/glossary_checks.py
++++ b/utils/glossary_checks.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ """Runs a glossary check on all po files and writes the check results to
+diff --git a/utils/macos/fix_dependencies.py b/utils/macos/fix_dependencies.py
+index f8a47c1..122fb85 100755
+--- a/utils/macos/fix_dependencies.py
++++ b/utils/macos/fix_dependencies.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # -*- coding: utf-8 -*-
+ 
+ """This tool was written out of frustration with
+diff --git a/utils/make_spritemap.py b/utils/make_spritemap.py
+index be919b4..ee4f781 100755
+--- a/utils/make_spritemap.py
++++ b/utils/make_spritemap.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ import argparse
+diff --git a/utils/optimize_pngs.py b/utils/optimize_pngs.py
+index 0717493..a5f7d2f 100755
+--- a/utils/optimize_pngs.py
++++ b/utils/optimize_pngs.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ from glob import glob
+diff --git a/utils/pywi/tests.py b/utils/pywi/tests.py
+index 1e81535..12159a3 100755
+--- a/utils/pywi/tests.py
++++ b/utils/pywi/tests.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ import config
+ import animation
+ """Tests for various pywi modules."""
+diff --git a/utils/rename_animation.py b/utils/rename_animation.py
+index b25d437..06552c2 100755
+--- a/utils/rename_animation.py
++++ b/utils/rename_animation.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ """Tool to rename all files for a widelands animation in bulk."""
+diff --git a/utils/run-clang-tidy.py b/utils/run-clang-tidy.py
+index 5bbc444..6b9b01a 100755
+--- a/utils/run-clang-tidy.py
++++ b/utils/run-clang-tidy.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ #
+ #===- run-clang-tidy.py - Parallel clang-tidy runner ---------*- python -*--===#
+ #
+diff --git a/utils/syncstream/syncexcerpt-to-text.py b/utils/syncstream/syncexcerpt-to-text.py
+index e2c05e3..adec2be 100755
+--- a/utils/syncstream/syncexcerpt-to-text.py
++++ b/utils/syncstream/syncexcerpt-to-text.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python3
++#!/usr/bin/python3
+ 
+ import struct
+ import sys
+diff --git a/utils/test/test_lua-xgettext.py b/utils/test/test_lua-xgettext.py
+index 24798c6..3b592f7 100644
+--- a/utils/test/test_lua-xgettext.py
++++ b/utils/test/test_lua-xgettext.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ from lua_xgettext import gettext, Lua_GetText, head
+diff --git a/utils/test/test_make_spritemap.py b/utils/test/test_make_spritemap.py
+index 28e9042..a494a1f 100644
+--- a/utils/test/test_make_spritemap.py
++++ b/utils/test/test_make_spritemap.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ 
+ import make_spritemap
+ import numpy as np
+diff --git a/utils/update_appdata.py b/utils/update_appdata.py
+index fdbcfcc..bda0544 100755
+--- a/utils/update_appdata.py
++++ b/utils/update_appdata.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ from subprocess import call, Popen, PIPE
+diff --git a/utils/update_authors.py b/utils/update_authors.py
+index f09656e..56fb318 100755
+--- a/utils/update_authors.py
++++ b/utils/update_authors.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ import codecs
+diff --git a/utils/update_copyright.py b/utils/update_copyright.py
+index 760949f..ba1ae8c 100755
+--- a/utils/update_copyright.py
++++ b/utils/update_copyright.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ import os.path
+diff --git a/utils/validate_json.py b/utils/validate_json.py
+index cbe02a6..b3726c2 100755
+--- a/utils/validate_json.py
++++ b/utils/validate_json.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/python3
+ # encoding: utf-8
+ 
+ import codecs
+diff --git a/xdg/CMakeLists.txt b/xdg/CMakeLists.txt
+index 889ef2d..f54e009 100644
+--- a/xdg/CMakeLists.txt
++++ b/xdg/CMakeLists.txt
+@@ -6,19 +6,19 @@ set(XDG_APPLICATION_ID "org.widelands.Widelands")
+ list(APPEND icon_sizes "16" "32" "48" "64" "128")
+ foreach (icon_size ${icon_sizes})
+   #install(FILES ${CMAKE_SOURCE_DIR}/data/images/logos/wl-ico-${icon_size}.png DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/icons/hicolor/${icon_size}x${icon_size}/apps RENAME ${XDG_APPLICATION_ID}.png)
+-  install(FILES ${CMAKE_SOURCE_DIR}/data/images/logos/wl-ico-${icon_size}.png DESTINATION ../share/icons/hicolor/${icon_size}x${icon_size}/apps RENAME ${XDG_APPLICATION_ID}.png)
++  install(FILES ${CMAKE_SOURCE_DIR}/data/images/logos/wl-ico-${icon_size}.png DESTINATION share/icons/hicolor/${icon_size}x${icon_size}/apps RENAME ${XDG_APPLICATION_ID}.png)
+ endforeach (icon_size ${icon_sizes})
+ #install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/${CMAKE_PROJECT_NAME}.6           DESTINATION ${CMAKE_INSTALL_MANDIR}/man6)
+-install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/${CMAKE_PROJECT_NAME}.6           DESTINATION ../share/man/man6)
++install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/${CMAKE_PROJECT_NAME}.6           DESTINATION share/man/man6)
+ #install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/${XDG_APPLICATION_ID}.desktop     DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/applications)
+-install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/${XDG_APPLICATION_ID}.desktop     DESTINATION ../share/applications)
++install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/${XDG_APPLICATION_ID}.desktop     DESTINATION share/applications)
+ #install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/${XDG_APPLICATION_ID}.appdata.xml DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/metainfo)
+-install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/${XDG_APPLICATION_ID}.appdata.xml DESTINATION ../share/metainfo)
++install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/${XDG_APPLICATION_ID}.appdata.xml DESTINATION share/metainfo)
+ 
+ find_program(GTK_UPDATE_ICON_CACHE NAMES gtk-update-icon-cache)
+ if (GTK_UPDATE_ICON_CACHE)
+   #install(CODE "execute_process (COMMAND ${GTK_UPDATE_ICON_CACHE} -t -f ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATAROOTDIR}/icons/hicolor ||: )")
+-  install(CODE "execute_process (COMMAND ${GTK_UPDATE_ICON_CACHE} -t -f ${CMAKE_INSTALL_PREFIX}/../share/icons/hicolor ||: )")
++  install(CODE "execute_process (COMMAND ${GTK_UPDATE_ICON_CACHE} -t -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor ||: )")
+ else (GTK_UPDATE_ICON_CACHE)
+   message(WARNING "gtk-update-icon-cache not found!")
+ endif (GTK_UPDATE_ICON_CACHE)
diff --git a/widelands.spec b/widelands.spec
index d1b4402..bc84025 100644
--- a/widelands.spec
+++ b/widelands.spec
@@ -1,13 +1,17 @@
+%define bld	21
+
 Summary:	Settlers II clone
 Name:		widelands
-Version:	20
+Version:	%{bld}
 Release:	1
 License:	GPLv2+
 Group:		Games/Strategy
 Url:		http://www.widelands.org/
-Source0:	https://launchpad.net/widelands/build20/build20/+download/%{name}-build%{version}.tar.bz2
+Source0:	https://launchpad.net/widelands/build20/build21/+download/%{name}-build%{bld}-source.tar.gz
 Source1:	%{name}.desktop
 Source100:	widelands.rpmlintrc
+# gcc flags and python3.Sflo
+Patch0:     widelamds_bld21-rosa.patch
 BuildRequires:	cmake
 BuildRequires:	ctags
 BuildRequires:	doxygen
@@ -30,7 +34,7 @@ BuildRequires:	pkgconfig(SDL2_net)
 BuildRequires:	pkgconfig(SDL2_ttf)
 BuildRequires:	pkgconfig(zlib)
 BuildRequires:	pkgconfig(icu-i18n)
-BuildRequires:	python
+BuildRequires:	python3
 
 Requires:	%{name}-basic-data = %{EVRD}
 Requires:	%{name}-maps = %{EVRD}
@@ -47,9 +51,9 @@ idea what Widelands is about.
 %doc ChangeLog COPYING CREDITS
 %{_gamesbindir}/%{name}
 %{_gamesbindir}/wl*
-%{_appdatadir}/org.widelands.%{name}.appdata.xml
+%{_appdatadir}/org.widelands.Widelands.appdata.xml
 %{_datadir}/applications/%{name}.desktop
-%{_iconsdir}/hicolor/*/apps/%{name}.png
+%{_iconsdir}/hicolor/*/apps/*.png
 %{_mandir}/man6/%{name}.*
 
 #------------------------------------------------
@@ -129,13 +133,18 @@ These are not needed, but may improve fun while playing.
 
 
 %prep
-%setup -qn %{name}-build%{version}
+%setup -qn %{name}-build%{bld}
+%patch0 -p1
 
-%build
+%build	
 %cmake  -DCMAKE_BUILD_TYPE="Release" \
-	-DCMAKE_INSTALL_PREFIX=%{_prefix} \
-	-DWL_INSTALL_BASEDIR=%{_prefix} \
-	-DWL_INSTALL_DATADIR=%{_gamesdatadir}/%{name} 
+  -DWL_INSTALL_PREFIX=%{_prefix} \
+  -DWL_INSTALL_BINDIR=%{_gamesbindir} \
+  -DWL_INSTALL_DATADIR=%{_gamesdatadir}/%{name} \
+  -DWL_INSTALL_LOCALEDIR=%{_datadir}/%{name}/locale \
+  -DBoost_USE_STATIC_LIBS=OFF	
+	
+	
 %make
 
 %install
@@ -147,18 +156,16 @@ for size in 16 32 48 64 128; do
 done
 
 # appdata
-install -D -m0644 debian/widelands.appdata.xml \
-    %{buildroot}%{_appdatadir}/org.widelands.%{name}.appdata.xml
+install -D -m0644 xdg/org.widelands.Widelands.appdata.xml \
+    %{buildroot}%{_appdatadir}/org.widelands.Widelands.appdata.xml
 # man     
-install -D -m0644 debian/widelands.6 \
+install -D -m0644 xdg/widelands.6 \
     %{buildroot}%{_mandir}/man6/widelands.6
 
 # menu entry
 install -m644 %{SOURCE1} -D %{buildroot}/%{_datadir}/applications/%{name}.desktop  
-
-# executables
-mkdir -p %{buildroot}%{_gamesbindir}
-mv %{buildroot}/usr/{widelands,wl_map_object_info,wl_map_info} %{buildroot}%{_gamesbindir}
+# use our desktop 
+rm -fr %{buildroot}/%{_datadir}/applications/org.widelands.Widelands.desktop
 
 # docs
 mv %{buildroot}/usr/{VERSION,ChangeLog,CREDITS,COPYING} %{buildroot}%{_gamesdatadir}/%{name}